OMAHA (DTN) -- Spring shipping season is near. The Upper Mississippi River opened after a vessel moved barges through Lock and Dam 2 as the lead-off act. But three of the Great Lakes remain more than 50% ice covered.

On the first day of spring 2015, 12 to 13 miles of Lake Pepin were covered in ice with the thickest spot 19 inches. Lake Pepin is located 60 miles downriver from St. Paul, Minnesota.

According to the Minnesota Department of Natural Resources, Lake Pepin is the largest lake on the Mississippi River. It is basically the only "highway" to get ...

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